I have to echo the criticism of calling this active tone control the 'G Spot'. It's not offensive, it's just cheesy and incredibly naff. Boutqiue basses are all about that high end, luxury experience - having the best of the best and feeling that refinement and quality in every aspect of the product. This rather tacky marketing stunt of making a deal of this 'G Spot' seems really at odds with what Markbass is trying to achieve here.
I am not going to dismiss this venture out of hand as Markbass know their onions when it comes to making good amps, but I rather feel that they will need a considerable push to break into the bass market in any meaningful way and the signs are that their initial offering is fraut with a few missteps. The most obvious one to me is the naff marketing on the 'G Spot', but there are other issues here too. I don't dislike the Kimandu/Kilimanjaro basses but they have always looked to my eye to look like a poor imitation of the Zon Legacy. The bottom horn looks to have been taken from Michael Manring's extended range Sonus fretless. It looks as though the designers just cobbled the body together after a brief look over the Zon website. I note that Bona played a Zon Legacy a few years ago (IIRC when he was playing with Joe Zawinul).
On the other hand, my brother has the Markbass Ninja 1000 head and cab and it's a really great sounding amp. I play through a Markbass CMD 151P Jeff Berlin combo and I love it. I love Markbass amps, they just have a great tone, but I am waiting to be convinced over their bass offering.